71500 Sierra Cable Lasher Operation and Maintenance All rights reserved. No part of this publication may be copied, reproduced or transmitted in any form whatsoever without the written permission of General Machine Products Co., Inc. General Machine Products Co., Inc. • 3111 Old Lincoln Hwy • Trevose, PA 19053 • USA TEL: +1-215-357-5500 • FAX: +1-215-357-6216 • www.gmptools.com Page 1 of 16 Manual P/N 29887 VER 2 AK 02-22-2013 General Machine Products Co., Inc.
REVISION HISTORY: Rev No. Date Details Author 01 05-2012 Original issue A.Konschak 02 02-2013 Revised format for clarity A. Konschak Page 2 of 16 General Machine Products Co., Inc.
CONTENTS 1.0 Introduction 2.0 Safety Instructions 3.0 General Description 4.0 Specification 5.0 Layout 6.0 Operating Procedure 7.0 Maintenance and Servicing 8.0 Trouble Shooting APPENDICES Appendix 1 Appendix 2 Appendix 3 Lashing wire clamp installation Lashing wire recommendations Accessories Page 3 of 16 General Machine Products Co., Inc.
1.0 INTRODUCTION Founded by engineer George M. Pfundt in 1936, GMP started operations in a downtown Philadelphia building as a specialty machine shop doing work for the local Bell Telephone company and for the electric utility company. GMP expanded to a production shop after landing a contract with Western Electric Company and, subsequently, forming a close relationship with Bell Telephone Laboratories in Murray Hill, N.J.
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3.0 GENERAL DESCRIPTION General Information: The GMP Sierra pull type cable lasher weighs just 19 pounds (8.6 kg) and single lashes one or multiple cables from drop wire size to a combined 1 15/16" (50 mm) outside diameter. Because the lashing wire pays out from a friction wheel engaged whenever the lasher is pulled forward, no strand traction is needed. This lasher is a piece of precision equipment. Treat it as such.
6.0 OPERATION PROCEDURE 1. Loading the Wire Spools on the Lasher A. Remove the wire spool flange from the machine by turning it clockwise. This has a left hand thread. Carefully cut and remove two of the (a) four coil bindings on opposite ends. Take care not to nick the wire. Rotate the remaining (b) binding heads on both ties to the edge of the coil. B. Cut the loop off of the end of the inside and outside of the wire. Pull off about 3’ (1m) of wire from the outside end of the coil.
6.0 OPERATION PROCEDURE 2. Preparing the Sierra lasher for Operation B. Attach one side of the towing bridle to either of the two towing eyes on the lasher. A. Open the strand lock (a), cable placing roller (b) and the rear gate roller (c). a b c C. Place the lasher on the strand. D. Attach (tether) the other end of the towing bridle to the strand to prevent the lasher from accidentally falling. E. Close the strand lock, cable placing roller and the rear gate roller .
6.0 OPERATION PROCEDURE 3. Termination Of Lashing Wire A. Once you’ve reached the end of the pull, while maintaining tension on lashing wire, temporarily clamp the wire with a Lashing Wire Grip Tool . B. Rotate the lasher to align the 2 marks on the body and the end plate C. Engage the Cam Lock to lock the barrel open and prevent the lasher from spinning. D. Pull about 3’ (1m) of wire off the lasher and make 2 turns around the wire tension roller to prevent the coil from unraveling.
6.0 OPERATION PROCEDURE 4. Transferring the Sierra Around a Pole Warning: While aloft, ALWAYS wear a safety belt with a safety strap securely attached to help prevent you from falling. Transferring your lasher around a pole When you need to move your Sierra lasher around a pole or other obstruction, follow these steps. 1. Before doing anything, make sure you are working from a secure perch where you can safely move your Sierra lasher with out overreaching. This is extremely important. 2.
7.0 MAINTENANCE AND SERVICING Monthly Lubrication Points and Adjustments G Grease Use a quality white lithium grease like a CRC 5037 G Ensure that there is a light coating of grease on all surfaces where the aluminum body contacts and rotates around the brass end plate and the ring gear. O Oil Use a clean 10w automotive type oil ! Do not over lubricate. Keep oil and grease away from the friction drive wheel. Wipe off any excess oil from your lasher afterwards.
8.0 TROUBLE SHOOTING The lashing wire won’t pay out: This indicates the wire isn’t threaded properly. Refer to “Loading Wire Spools On the Lasher” in section 6.0. Note: if you are unable to achieve positive drive, the lashing wire may need to be threaded twice around the friction wheel. The wire jumps off of the wire guide tension roller: This indicates the lashing wire is improperly threaded. Refer to “Loading Wire Spools On the Lasher” in section 6.0.
APPENDIX 1 Lashing Wire Clamp Installation Page 13 of 16 General Machine Products Co., Inc.
APPENDIX 2 Stainless Steel Lashing Wire Recommendations Stainless Steel Lashing Wire is used in your lasher to lash an aerial cable or combination of cables to a supporting strand. GMP lashing wire uses a specially controlled annealing process yields a uniform, fine grain structure throughout wire length and cross section for best results. The wire Is available in a 430, 302, and 316 stainless steel alloy and is packaged as 6 coils per carton for your ordering convenience.
APPENDIX 3 Accessories D Lashing Wire Clamp Perfect for temporary and permanent terminations or grounds, this all steel clamp lets you securely attach two lashing wires or #6 ground wire on any size strand from 1/4 in. to 7/16 in. (6-11 mm) diameter. P/N 07886 Weight: 15 lbs./100 per carton Lashing Wire Grip A screw type grip used to temporarily fasten lashing wire under tension before placing a permanent clamp like our D or E Lashing Wire Clamps. P/N 08605 Weight: 10 oz. (.
GMP • 3111 Old Lincoln Hwy • Trevose, PA 19053 • USA TEL: +1-215-357-5500 • FAX: +1-215-357-6216 • www.gmptools.com Page 16 of 16 General Machine Products Co., Inc.
